IMPACT FORCE CHARACTERISTICS OF SOLE BY WALKING : Study of the residential floor vibration characteristics and floor impact sound insulation performance taking foot step sensation into consideration Part 1

勝夫, 井上; 翔, 木村; 暁洋, 前原; 秀夫, 渡辺; 明彦, 松岡

doi:10.3130/aija.60.1_11

Cited by 4 publications

(1 citation statement)

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“…Considering the possibility that the internal impedance changes depending on the applied pressure, we measured the frequency response of the impedance while changing the applied pressure. The applied pressure was assumed to be time-invariant, and since the pressure applied to the foot during walking ranges from 0 N to 700 N [27], the frequency response was measured while forces of 50 N, 100 N, 300 N, 500 N, and 700 N were applied to the piezoelectric element.…”

Section: Derivation Of Internal Impedancementioning

confidence: 99%

Batteryless BLE Module with a Piezoelectric Element Mounted on a Shoe Sole

Dan,

Yano,

Wang

2024

Sensors

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A position identification system for wandering elderly people uses BLE to transmit ID information. The objective of this study is to make the BLE module batteryless using a piezoelectric element. The piezoelectric element is mounted on the sole of a shoe, and when pressure is applied to the piezoelectric element by walking, a voltage is generated between both electrodes of the piezoelectric element. This voltage is used to store the necessary power as a battery to operate the BLE module. In this paper, we provide a step-by-step design approach using piezoelectric elements attached to a shoe to power an actual BLE module. We derive an equivalent circuit for the piezoelectric element under walking conditions and, through circuit simulation and actual measurements, clarify the amount of time required to charge the voltage to drive the BLE, demonstrating the possibility of a batteryless BLE module for use in locating a wanderer while they are walking.

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Section: Derivation Of Internal Impedancementioning

confidence: 99%

Batteryless BLE Module with a Piezoelectric Element Mounted on a Shoe Sole

Dan,

Yano,

Wang

2024

Sensors

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TRIAL PRODUCTION OF A FLOOR IMPACT SOURCE AND ITS APPLICATION FOR MEASUREMENT OF VIBRATION CHARACTERISTICS IN HOUSING FLOORS : Study of the residential floor vibration characteristics and floor impact sound insulation performance taking footstep sensation info consideration Part 2

Inoue

Kimura

Maehara

et al. 1996

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We conduered various experimental research dealing with physical characteristics and sensation in order to be able to quantitatively express appropriate hardness in terms ofcornfo 砌 bility in residen 酬 noors ． From among these ， we indica 重ed in this paper the results of studies and the produotion ofaprototype impact source involv 血 g the impact fbrce ofthe heel ， which ［ s a representative impact force generated by f［〕otsteps． Then using the impact source to measure the amount ofdynamic Clisplacement in wooden fioors ofold construction and inthedirect − pasted wood flooring common 】 y used in recent multl − fami 】 y housing ， we quantitatively determined the dynamio spring coe 丗 cient oftraditional wood − construction 且oor struoture ， whioh had never befbre been clarified ， and found that ， among the displacement characteristics of 且oor construction， there are those that depend on be皿ding defbrmation ， those that depend on local compression defbrmation ， those that have both ， suggesting 亡 hat those displacement characteristics may have a strong effect on the intensity of f（｝otstep sensat め n ． Key ・v ・ rds ・housingfl ・・r ， vib 厂ati ・ n ・ eharaCteris

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